Electrochemical Aspects of Electroosmotic Dewatering of Clay Suspensions

An attempt is made to elucidate the electrochemical aspects of the electroosmotic dewatering (EOD) of clays as reported in some recent work, especially that on interrupted DC power electroosmotic dewatering published by Rabie, Mujumdar and Weber (2). These authors showed that the dewatering by EOD stops after the DC power has been on for several minutes or hours; on interruption of their power and on short-circuiting of the electrodes, conditions can be created again for some further dewatering by DC power EOD. This discovery, of Rabie et al. is interpreted as a fuel cell effect and it is shown that it affords clues to several other electrochemical strategies for the possible enhancement of the efficiency of the EOD by DC power.

Further, the open circuit potentials observed by Rabie et al. (2) on the interruption of DC power are given an electrochemical interpretation which leads to quantitative estimates in agreement with the experimental values.     

Study on calculation method of surface subsidence about the dewatering concretion of clay influenced by mining

Under the condition of thick alluvia, there is biggish declination in predicting the coal mining subsidence by commonly strip design method compared with the practical observation, the sinkage is much smaller. Based on the method of the probability integral about coal mining subsidence calculation, discussed the surface subsidence calculation and deduced the formulas caused by the clay with dewatering. The results show that the clay dewatering has great impact on surface subsidence. Therefore, the clay dewatering on surface subsidence should not be overlooked.     

含水固形物干燥脱水蒸汽再利用专利技术工艺及设备

在无机盐产品生产过程中,中间产品和副产品通常需要进行干燥,文章对含水固形物干燥脱水蒸汽再利用工艺及设备进行了论述。并就干燥脱水蒸汽再利用专利工艺及设备对节省能源消耗进行了分析。     

食盐脱水新工艺研究

研究了利用微波干燥食盐的工艺，并分析了微波功率、辐射时间、物料质量和物料厚度对食盐脱水率的影响。     

聚乙烯亚胺双组分体系在废新闻纸浆造纸中的应用

本研究以废新闻纸浆作为研究对象，利用聚乙烯亚胺及其改性物分别与阳离子聚丙烯酰胺、阳离子淀粉组成的双组分体系，分析了其助留助滤效果，以及对纸张白度、强度等的影响。     

水平式夹网成形器的研发

主要介绍河南江河纸业有限公司在建#6机的水平式夹网成形器,从其结构特点出发,详细介绍其工作原理,影响其性能的一些因素及控制参数。     

叠螺脱水机与离心脱水机在污泥处理中的应用比较

阐述了炼油厂污泥的来源及特性,从工作原理、工艺流程和运行成本3方面对叠螺脱水机与离心脱水机进行了比较分析.2种污泥脱水机均适用于含油污泥(主要成分是浮渣)、剩余活性污泥的脱水处理;离心脱水机主要是依靠转鼓高转速产生的离心力使具有一定密度差的泥水分离,而叠螺脱水机主要是依靠螺杆的挤压来实现污泥脱水;离心脱水机必须配套污泥输送泵、比重剂加药设备;叠螺脱水机在运行成本上占有明显优势,还可以显著改善运行中对工作环境的污染.基于叠螺脱水机运用螺杆挤压原理实现污泥脱水,该设备不适用于含较大硬度颗粒的污泥脱水.     

国外炼油厂含油污泥处理技术

镇海炼油化工股份有限公司研究中心　浙江省宁波市　３１５２０７ 摘要：介绍了国外炼油厂有关含油污泥处理的污泥调质和机械脱水、泥饼的热处理和解吸,污泥的生物处理和溶剂萃取以及油的回收利用等技术。对处理效果和处理成本作了分析。最后,对发展我国含油污泥处理技术提出了建议。